<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>
  </head>
  <body>
    <button id="btn">按钮</button>
    <div id="app"></div>
    <script type="text/babel">
      const oBtn = document.getElementById("btn");

      //得到一个初始的列表数据
      const userData = ["HTML", "CSS", "JavaScript", "NodeJS"];
      const vDom = <div>
        {userData.map(item=>{
            return (<li key={item}>{item}
                <input type="text" /></li>)
        })}
        </div>
        const root = ReactDOM.createRoot(document.getElementById("app"));
        root.render(vDom);
    oBtn.onclick = function(){
        userData.unshift("React");
        const vDom = <div>
        {userData.map(item=>{
            return (<li key={item}>{item}
                <input type="text" />
                </li>)
        })}
        </div>
        root.render(vDom);
    }
    </script>
  </body>
</html>
